Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan 350Z 2003-2007 Approved Nissan 350Z 2003 Atc
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AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
A
B
SECTION
AUTOMATIC AIR CONDITIONER C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4
. PRESSURE RELIEF VALVE .............................. 19 . F
Precautions for Supplemental Restraint System V-6 Variable Displacement Compressor ................ 20 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- GENERAL INFORMATION ................................ 20 .
SIONER" ................................................................. 4
. DESCRIPTION ................................................... 21
. G
Precautions for Battery Service ............................... 4 . Component Layout ................................................ 23
.
Precautions for Working with HFC-134a (R-134a) 5 ..... LUBRICANT ............................................................. 24
.
CONTAMINATED REFRIGERANT ...................... 5 . Maintenance of Lubricant Quantity in Compressor 24 ...
H
General Refrigerant Precautions ............................. 6 . LUBRICANT ....................................................... 24
.
Lubricant Precautions ............................................. 6
. LUBRICANT RETURN OPERATION ................. 24 .
Precautions for Refrigerant Connection .................. 6 . LUBRICANT ADJUSTING PROCEDURE FOR
ABOUT ONE-TOUCH JOINT ............................... 7 . COMPONENTS REPLACEMENT EXCEPT I
FEATURES OF NEW TYPE REFRIGERANT COMPRESSOR ................................................. 25 .
CONNECTION ..................................................... 9. LUBRICANT ADJUSTING PROCEDURE FOR
O-RING AND REFRIGERANT CONNECTION... 10 COMPRESSOR REPLACEMENT ...................... 25 . ATC
Precautions for Servicing Compressor ...................11 . AIR CONDITIONER CONTROL .............................. 27 .
Precautions for Service Equipment ....................... 12 . Description of Air Conditioner LAN Control System 27 ...
RECOVERY/RECYCLING EQUIPMENT ........... 12 . System Construction ............................................. 27
.
K
ELECTRONIC LEAK DETECTOR ..................... 12 . OPERATION ....................................................... 28
.
VACUUM PUMP ................................................ 12 . TRANSMISSION DATA AND TRANSMISSION
MANIFOLD GAUGE SET ................................... 12 . ORDER .............................................................. 28
.
SERVICE HOSES .............................................. 13 . AIR MIX DOOR CONTROL (AUTOMATIC TEM- L
SERVICE COUPLERS ....................................... 13 . PERATURE CONTROL) .................................... 29 .
REFRIGERANT WEIGHT SCALE ..................... 13 . FAN SPEED CONTROL ..................................... 29 .
CALIBRATING ACR4 WEIGHT SCALE ............. 13 . INTAKE DOOR CONTROL ................................ 29 . M
CHARGING CYLINDER ..................................... 14 . OUTLET DOOR CONTROL ............................... 29 .
Precautions for Leak Detection Dye ...................... 14 . MAGNET CLUTCH CONTROL .......................... 30 .
IDENTIFICATION ............................................... 14 . SELF-DIAGNOSTIC SYSTEM ........................... 30 .
IDENTIFICATION LABEL FOR VEHICLE .......... 14 . Description of Control System ............................... 31 .
Wiring Diagrams and Trouble Diagnosis ............... 14 . Control Operation .................................................. 32
.
PREPARATION ........................................................ 15
. TEMPERATURE CONTROL DIAL (POTENTIO
Special Service Tools ............................................ 15
. TEMPERATURE CONTROL) ............................. 32 .
HFC-134a (R-134a) Service Tools and Equipment 15 ... INTAKE SWITCH ................................................ 32.
Commercial Service Tool ...................................... 18 . REAR WINDOW DEFOGGER SWITCH ............ 32 .
REFRIGERATION SYSTEM .................................... 19 . A/C SWITCH ...................................................... 32
.
Refrigerant Cycle .................................................. 19
. MODE CONTROL DIAL ..................................... 32 .
REFRIGERANT FLOW ...................................... 19 . FAN CONTROL DIAL ......................................... 32 .
FREEZE PROTECTION .................................... 19 . Discharge Air Flow ................................................ 33
.
Refrigerant System Protection .............................. 19 . System Description ................................................ 34
.
REFRIGERANT PRESSURE SENSOR ............ 19 . SWITCHES AND THEIR CONTROL FUNCTION 34 ...
ATC-1
CAN Communication System Description ............. 35 . DIAGNOSTIC PROCEDURE FOR AIR MIX
CAN Communication Unit ...................................... 35 . DOOR PBR .........................................................75 .
TYPE 1 ............................................................... 35
. Intake Door Motor Circuit .......................................76 .
TYPE 2/TYPE3 ................................................... 37 . INSPECTION FLOW ...........................................76 .
TYPE 4/TYPE5 ................................................... 39 . SYSTEM DESCRIPTION ....................................77 .
TYPE 6/TYPE7 ................................................... 40 . COMPONENT DESCRIPTION ...........................78 .
TROUBLE DIAGNOSIS ........................................... 42 . DIAGNOSTIC PROCEDURE FOR INTAKE
CONSULT-II ........................................................... 42
. DOOR MOTOR ...................................................79 .
CONSULT-II INSPECTION PROCEDURE ......... 42 . Blower Motor Circuit ...............................................79 .
DATA MONITOR ................................................. 43 . INSPECTION FLOW ...........................................79 .
How to Perform Trouble Diagnoses for Quick and SYSTEM DESCRIPTION ....................................80 .
Accurate Repair ..................................................... 44
. COMPONENT DESCRIPTION ...........................81 .
WORK FLOW ..................................................... 44 . DIAGNOSTIC PROCEDURE FOR BLOWER
SYMPTOM TABLE ............................................. 44 . MOTOR ...............................................................81.
Component Parts and Harness Connector Location 45 ... COMPONENT INSPECTION ..............................83 .
ENGINE COMPARTMENT ................................. 45 . Magnet Clutch Circuit .............................................84 .
PASSENGER COMPARTMENT ......................... 46 . INSPECTION FLOW ...........................................84 .
Schematic .............................................................. 47
. SYSTEM DESCRIPTION ....................................85 .
Wiring Diagram --A/C-- ........................................ 48 . DIAGNOSTIC PROCEDURE FOR MAGNET
Auto Amp. Terminals and Reference Value ........... 53 . CLUTCH .............................................................85 .
PIN CONNECTOR TERMINAL LAYOUT ........... 53 . COMPONENT INSPECTION ..............................89 .
TERMINALS AND REFERENCE VALUE FOR Insufficient Cooling .................................................90 .
UNIFIED METER AND A/C AMP. ...................... 53 . INSPECTION FLOW ...........................................90 .
Self-diagnosis Function ......................................... 55 . PERFORMANCE TEST DIAGNOSES ...............91 .
DESCRIPTION ................................................... 55 . PERFORMANCE CHART ...................................93 .
FUNCTION CONFIRMATION PROCEDURE ..... 57 . TROUBLE DIAGNOSES FOR UNUSUAL PRES-
AUXILIARY MECHANISM: TEMPERATURE SURE ..................................................................94
.
SETTING TRIMMER .......................................... 60 . Insufficient Heating ................................................97 .
AUXILIARY MECHANISM: FOOT POSITION INSPECTION FLOW ...........................................97 .
SETTING TRIMMER .......................................... 61 . Noise ......................................................................98
.
AUXILIARY MECHANISM: INLET PORT MEM- INSPECTION FLOW ...........................................98 .
ORY FUNCTION ................................................ 62 . Self-diagnosis ........................................................99.
Operational Check ................................................. 63 . INSPECTION FLOW ...........................................99 .
CHECKING BLOWER ........................................ 63 . Ambient Sensor Circuit ........................................ 100 .
CHECKING DISCHARGE AIR ........................... 63 . COMPONENT DESCRIPTION ......................... 100 .
CHECKING INTAKE DOOR ............................... 63 . AMBIENT TEMPERATURE INPUT PROCESS .100
CHECKING TEMPERATURE DECREASE ........ 64 . DIAGNOSTIC PROCEDURE FOR AMBIENT
CHECKING TEMPERATURE INCREASE ......... 64 . SENSOR ........................................................... 100 .
CHECKING A/C SWITCH .................................. 64 . COMPONENT INSPECTION ............................ 102 .
Power Supply and Ground Circuit for Auto Amp. ... 65 In-vehicle Sensor Circuit ...................................... 102 .
INSPECTION FLOW .......................................... 65 . COMPONENT DESCRIPTION ......................... 102 .
COMPONENT DESCRIPTION ........................... 65 . DIAGNOSTIC PROCEDURE FOR IN-VEHICLE
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 66 ... SENSOR ........................................................... 103 .
LAN System Circuit ............................................... 67 . COMPONENT INSPECTION ............................ 104 .
DIAGNOSTIC PROCEDURE FOR LAN CIR- Sunload Sensor Circuit ........................................ 105 .
CUIT ................................................................... 67
. COMPONENT DESCRIPTION ......................... 105 .
Mode Door Motor Circuit ....................................... 70 . SUNLOAD INPUT PROCESS .......................... 105 .
INSPECTION FLOW .......................................... 70 . DIAGNOSTIC PROCEDURE FOR SUNLOAD
SYSTEM DESCRIPTION ................................... 71 . SENSOR ........................................................... 105 .
COMPONENT DESCRIPTION ........................... 72 . COMPONENT INSPECTION ............................ 107 .
DIAGNOSTIC PROCEDURE FOR MODE Intake Sensor Circuit ............................................ 108 .
DOOR MOTOR .................................................. 72 . COMPONENT DESCRIPTION ......................... 108 .
Air Mix Door Motor Circuit ..................................... 72 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
INSPECTION FLOW .......................................... 73 . SOR .................................................................. 108
.
SYSTEM DESCRIPTION ................................... 74 . COMPONENT INSPECTION ............................ 109 .
COMPONENT DESCRIPTION ........................... 75 . A/C CONTROLLER ................................................ 110 .
DIAGNOSTIC PROCEDURE FOR AIR MIX Removal and Installation ...................................... 110 .
DOOR ................................................................. 75
. REMOVAL ......................................................... 110 .
Air Mix Door Motor PBR Circuit ............................. 75 . INSTALLATION ................................................. 110 .
ATC-2
AUTO AMP ............................................................. 111. HFC-134a (R-134a) Service Procedure .............. 131 .
Removal and Installation of Unified Meter and A/C SETTING OF SERVICE TOOLS AND EQUIP- A
Amp. ..................................................................... 111
. MENT ............................................................... 131
.
REMOVAL ......................................................... 111 . Components ........................................................ 133.
INSTALLATION ................................................. 111 . Compressor ......................................................... 134
. B
AMBIENT SENSOR ................................................112 . REMOVAL ........................................................ 134 .
Removal and Installation ......................................112 . INSTALLATION ................................................ 135 .
REMOVAL .........................................................112 . Compressor Clutch .............................................. 135 .
INSTALLATION .................................................112 . REMOVAL ........................................................ 135 . C
IN-VEHICLE SENSOR ............................................113 . INSTALLATION ................................................ 137 .
Removal and Installation ......................................113 . Low-pressure Flexible Hose ................................ 139 .
REMOVAL .........................................................113 . REMOVAL ........................................................ 139 . D
INSTALLATION .................................................113 . INSTALLATION ................................................ 139 .
SUNLOAD SENSOR ..............................................114 . High-pressure Flexible Hose ............................... 140 .
Removal and Installation ......................................114 . REMOVAL ........................................................ 140 . E
REMOVAL .........................................................114 . INSTALLATION ................................................ 141 .
INSTALLATION .................................................114 . High-pressure Pipe 1 (Engine Compartment) ..... 141 .
INTAKE SENSOR ...................................................115 . REMOVAL ........................................................ 141 .
Removal and Installation ......................................115 . INSTALLATION ................................................ 142 . F
REMOVAL .........................................................115 . Low-pressure Pipe and High-pressure Pipe 2 ..... 142 .
INSTALLATION .................................................116 . REMOVAL ........................................................ 142 .
BLOWER UNIT .......................................................117 . INSTALLATION ................................................ 143 . G
Removal and Installation ......................................117 . Liquid Tank .......................................................... 143
.
REMOVAL .........................................................117 . REMOVAL ........................................................ 143 .
INSTALLATION .................................................117 . INSTALLATION ................................................ 144 . H
Disassembly and Assembly .................................118 . Condenser ........................................................... 144
.
BLOWER MOTOR ..................................................119 . REMOVAL ........................................................ 144 .
Removal and Installation ......................................119 . INSTALLATION ................................................ 145 .
I
REMOVAL .........................................................119 . Refrigerant Pressure Sensor ............................... 146 .
INSTALLATION .................................................119 . REMOVAL ........................................................ 146 .
INTAKE DOOR MOTOR ........................................ 120 . INSTALLATION ................................................ 146 .
Removal and Installation ..................................... 120 . Evaporator ........................................................... 146
. ATC
REMOVAL ........................................................ 120 . REMOVAL ........................................................ 146 .
INSTALLATION ................................................ 120 . INSTALLATION ................................................ 146 .
HEATER & COOLING UNIT ASSEMBLY ............. 121 . Expansion Valve .................................................. 147 . K
Removal and Installation ..................................... 121 . REMOVAL ........................................................ 147 .
REMOVAL ........................................................ 121 . INSTALLATION ................................................ 147 .
INSTALLATION ................................................ 122 . Checking for Refrigerant Leaks ........................... 148 . L
Disassembly and Assembly ................................ 123 . Checking System for Leaks Using the Fluorescent
MODE DOOR MOTOR .......................................... 125 . Leak Detector ...................................................... 148
.
Removal and Installation ..................................... 125 . Dye Injection ........................................................ 148
.
REMOVAL ........................................................ 125 . Electronic Refrigerant Leak Detector ................... 149 . M
INSTALLATION ................................................ 125 . PRECAUTIONS FOR HANDLING LEAK
AIR MIX DOOR MOTOR ........................................ 126 . DETECTOR ...................................................... 149 .
Removal and Installation ..................................... 126 . CHECKING PROCEDURE .............................. 149 .
REMOVAL ........................................................ 126 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 152 .
INSTALLATION ................................................ 126 . Compressor ......................................................... 152
.
DUCTS AND GRILLES ......................................... 127 . Lubricant .............................................................. 152
.
Removal and Installation ..................................... 127 . Refrigerant ........................................................... 152
.
REMOVAL ........................................................ 127 . Engine Idling Speed ............................................ 152 .
INSTALLATION ................................................ 130 . Belt Tension ......................................................... 152
.
REFRIGERANT LINES .......................................... 131 .
ATC-3
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" AJS0009F
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness connec-
tors.
Precautions for Battery Service AJS000S7
This vehicle is equipped with the automatic window adjusting function. When a door is opened, the window
automatically lowers slightly to avoid contact between the window and the side roof panel. After the door is
closed, the window will automatically raise slightly.
On vehicles equipped with the automatic window adjusting function, lower both the driver and front passenger
side windows before disconnecting the battery cables. This will prevent interference between the side window
and the roof panel when either door is opened/closed.
CAUTION:
After the battery cables are disconnected, do not open/close the driver and/or front passenger door
with the window in the full up position. The automatic window adjusting function will not work and the
side roof panel may be damaged.
ATC-4
PRECAUTIONS
Precautions for Working with HFC-134a (R-134a) AJS0009G
A
WARNING:
q CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
are mixed and compressor malfunction is likely to occur, refer to "CONTAMINATED REFRIGER-
ANT" below. To determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use B
Refrigerant Recovery/Recycling Recharging equipment (ACR4) (J-39500-NI) and Refrigerant Iden-
tifier.
q Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) compo- C
nents. If lubricant other than that specified is used, compressor malfunction is likely to occur.
q The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The fol-
lowing handling precautions must be observed: D
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